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Construction method of underground diaphragm wall in a tunnel

A construction method and continuous wall technology, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as adverse effects on the stability of tunnel structures, abnormal construction, and limited tunnel construction space, and achieve simple structure and convenient construction , flexible operation

Active Publication Date: 2021-02-12
BCEG CIVIL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for the underground diaphragm wall in the tunnel, to solve the technical problem that the traditional construction method cannot be constructed due to the limitation of the construction space in the tunnel and the adverse effect on the stability of the tunnel structure.

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  • Construction method of underground diaphragm wall in a tunnel
  • Construction method of underground diaphragm wall in a tunnel
  • Construction method of underground diaphragm wall in a tunnel

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Embodiment Construction

[0044] The construction method of the underground diaphragm wall in the tunnel includes the following steps.

[0045] Step 1: Construction of the guide wall; the construction process of the guide wall in the tunnel is: installation of the upper support of the tunnel → measuring and setting out → breaking the initial support structure at the bottom of the tunnel → digging trenches → binding the steel bars of the guide wall → setting up the formwork → pouring the concrete of the guide wall →Remove the formwork and install cross braces; during the construction of the guide wall in the tunnel, manual excavation is used to construct the guide wall due to the limited underground working space. The stability will be affected to a certain extent. I22a I-beam or Φ36 lead screw is used to support the upper part of the tunnel.

[0046] Step 2: Grooving: A small hydraulic grooving machine is used for grooving. A drill bit is installed in the center of the mechanical grab to increase the d...

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Abstract

A method for constructing an underground diaphragm wall in a tunnel, comprising the following steps: Step 1, construction of a guide wall; Step 2: forming grooves; Step 3: segmenting the diaphragm wall to be constructed to form a plurality of diaphragm walls to be constructed; Step 4: Construction of the first batch of steel skeletons in the tank; Step 5: Clean the I-beam wall of the underground diaphragm wall with a wall brush; Step 6: Clean the bottom and replace the slurry; Step 7: Carry out Construction of the second batch of reinforced skeletons; Step 8: Installation of locking pipes and conduits; Step 9: Second cleaning of the tank; Step 10: Underwater concrete pouring; Step 11: Pulling out the locking pipes. The invention solves the technical problem that the traditional construction method cannot be normally constructed due to the limitation of the construction space in the tunnel and the bad influence on the stability of the tunnel structure.

Description

technical field [0001] The invention relates to a construction method of an underground continuous wall in a tunnel. Background technique [0002] During the construction of the traditional subway underground excavation method, when the groundwater level is above the floor structure, the excavation and earthwork are generally completed by setting up a dewatering well for pumping and drainage to reduce the water level and adding a curtain to stop the water. Conventional water-stopping measures include deep-hole grouting, rotary grouting piles, occlusal piles, and underground diaphragm walls. However, the first three water-stopping measures have limitations, and the water-stopping effect is difficult to guarantee. Therefore, underground diaphragm walls have become the first choice for underground engineering water-stopping. an option. At present, the construction of the underground diaphragm wall is usually carried out on the ground, and the site range is large. In order to a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/18E02D5/18E02D15/06
Inventor 薛洪松段学锋杜昌隆刘希胜母贤辉孙雨晴冯宝家石广阔王杨
Owner BCEG CIVIL ENG
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